ASME VIII Certified U type Shell and Tube Heat Exchangers For Oil refineries
Yuhong group is a premier global provider of high-precision heat transfer solutions, specializing in the engineering, fabrication, and maintenance of mission-critical equipment for the oil, gas, and petrochemical industries.
Material List
| Item No. | Description | Dimensions / Size | Material Standard |
| 1 | Shell Course | I.D. 990*20 THK*L=2100$ | SA 516 Gr.60 |
| 4 | Elliptical Head 2:1 | I.D. 990*19 THK | SA 516 Gr.60 |
| 8 | Tubesheet | O.D. 1050*135 THK | SA 336 Gr.F11 Cl.2 |
| 41 | "U" Tubes | 25.4* 2.11 THK (MW)*2135 STR. LG. | SA 213 Gr.T11 |
| 45 | Tie Rods | 1/2" -UNC 2030 LG. | SA 193 Gr.B7 |
| 46 | Hex. Nuts | 1/2" -UNC (H=D) | SA 194 Gr.2H |
| 48/49 | Baffles (Odd/Even) | O.D. 985.2 10 THK | SA 387 Gr.11 Cl.2 |
| 52 | Sliding Rails | 6 THK 2000 LG. | SA 240-304L |
| PT1 | Flange | 1.1/2" 300# LWN-RF L=232 | SA 266 Cl.2 |
| PT3 | Flange | 1.1/2" 600# LWN-RF L=206 | SA 182 Gr.F11 Cl.2 |
| 50-52* | Exchange Tubes (Reboiler) | 3/4"*BWG14 | SA-179 |
SA-179 Material Specifications
| Property | Specification / Value |
| Standard | ASTM A179 / ASME SA179 |
| Grade | A179/SA179 |
| Carbon (C) | 0.06 - 0.18% |
| Manganese (Mn) | 0.27 - 0.63% |
| Phosphorus (P) | ≤ 0.035% |
| Sulfur (S) | ≤ 0.035% |
| Silicon (Si) | 0.10 - 0.35% (Some sources indicate it is not specified, but a typical range is provided) |
Mechanical Properties
| Property | Requirement |
| Tensile Strength | ≥ 325 MPa (47,000 psi) |
| Yield Strength | ≥ 180 MPa (26,000 psi) |
| Elongation (in 2 inches / 50 mm) | ≥ 35% |
| Hardness (Max) | ≤ 72 HRB |
Advantages of U-Tube Configurations
Thermal Expansion: The U-bend allows each tube to expand and contract independently.
Simplified Design: Since only one tubesheet is required (Item 8: SA 336 Gr. F11 Cl. 2), the number of potential leak points and the overall weight of the assembly are reduced.
Bundle Removability: Easily removed from the shell for cleaning or inspection.
High Pressure Resistance: The seamless nature of the tubes combined with a secure tubesheet joint allows for high-pressure service.
